package cn.kongwg.demo02;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * @author kongwg
 * @create 2021-05-26 18:55
 */
public class ConditionDemo {
    private int number = 1;
    private Lock lock = new ReentrantLock();
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();

    public void print5() {
        lock.lock();
        try {
            while (number != 1) {
                c1.await();
            }
            for (int i = 0; i < 5; i++) {
                System.out.println(Thread.currentThread().getName() + "\t daying"+i);
            }
            number = 2;
            c2.signal();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }

    }

    public void print10() {
        lock.lock();
        try {
            while (number != 2) {
                c2.await();
            }
            for (int i = 0; i < 10; i++) {
                System.out.println(Thread.currentThread().getName() + "\t daying"+i);
            }
            number = 3;
            c3.signal();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }

    }

    public void print15() {
        lock.lock();
        try {
            while (number != 3) {
                c3.await();
            }
            for (int i = 0; i < 15; i++) {
                System.out.println(Thread.currentThread().getName() + "\t daying"+i);
            }
            number = 1;
            c1.signal();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }

    }

    public static void main(String[] args) {
        ConditionDemo conditionDemo = new ConditionDemo();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                conditionDemo.print5();
            }
        }, "a").start();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                conditionDemo.print10();
            }
        }, "b").start();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                conditionDemo.print15();
            }
        }, "c").start();
    }
}
